Tendon-Inspired Piezoelectric Sensor for Biometric Application

Hojoon Kim, Kanghyeon Lee, Geonhui Jo, Jun Sik Kim, Myotaeg Lim, Youngsu Cha

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, a novel sensing structure is proposed to measure tensile loading. The sensing structure is motivated by the operating principle of the tendon. The fibro-elastic characteristic of the tendon is implemented by combining sewing and elastic threads with a piezoelectric material, that is, a tendon-inspired piezoelectric sensor. The mechanical deformation of the tendoninspired piezoelectric sensor was analyzed by applying tensile loading. Additionally, the electrical response according to the given tensile loading was measured and compared with the theoretical expectation. The experimental results found that the sensor outputs can be represented as a linear function along with elongation in a specific range. Furthermore, the motion-detecting capability of the sensor was demonstrated using body supports with seven tendon-inspired piezoelectric sensors. To show the feasibility of its application, a real-time motion detecting system using a virtual avatar was developed. The avatar showed good synchronization with the subject's upper-limb movements. This study provides insight into the sensing characteristics of the tendon-driven piezoelectric sensor and shows the potential for biometric applications.

Original languageEnglish
JournalIEEE/ASME Transactions on Mechatronics
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • Bioinspired
  • biometric
  • IEEE transactions
  • Loading
  • Mechatronics
  • piezoelectric material
  • Piezoelectric materials
  • Robot sensing systems
  • sensor
  • Sensors
  • Tendons

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering

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